package com.zhuang.spring.dao;

/**
 * description: BookDao
 * date: 2022/10/7 20:35
 * author: Zhuang
 * version: 1.0
 */
public interface BookDao {

    Integer getPriceByBookId(Integer bookId);

    void updateStock(Integer bookId);

    void updateBalance(Integer userId, Integer price);

}
